Once corrected calcemia <2.25 mmol / l, doses of CaCO3 will be increased; if the maximum tolerable of CaCO3 on the tract map does not prevent hypocalcemia (<2.10 mmol / l), the calcium bath will be increased to 1.75 mmol / l CaCO3 decreased and, if necessary adjustment of nicotinamide / Sevelamer to maintain PO4 between 1.30 and 1.60 mmol / l.